adding data in db related to user model

models.py

TITLE = (      ('Classroom', 'Classroom'),      ('Playground', 'Playground'),      ('Staff Room','Staff Room'),  )    class Location(models.Model):      user = models.OneToOneField(User,null=True)      title = models.CharField('Incident Type', max_length=200,default=TITLE)      parent_location_id = models.CharField('Parent Location', max_length=100, null=True, blank=True)      is_active = models.BooleanField('Is Active', default=True)    def location_title(sender, instance, created, **kwargs):              if instance.is_superuser and not instance.location.is_active:            instance.location.is_active=True          instance.location.save()    post_save.connect(location_title, sender=User)

I want to insert the default data into database with certain conditions.This should happen while creating superuser via manage.py createsuperuser comment.

I don't know it is possible with django,but it is the requirement.I tried with the above code.I am getting the error "AttributeError: 'User' object has no attribute 'location' " while creating superuser.

Getting this error while creating superuser.

Traceback:

Traceback (most recent call last):    File "manage.py", line 14, in <module>      execute_manager(settings)    File "/usr/lib/python2.7/site-packages/django/core/management/__init__.py", line 438, in execute_manager      utility.execute()    File "/usr/lib/python2.7/site-packages/django/core/management/__init__.py", line 379, in execute      self.fetch_command(subcommand).run_from_argv(self.argv)    File "/usr/lib/python2.7/site-packages/django/core/management/base.py", line 191, in run_from_argv      self.execute(*args, **options.__dict__)    File "/usr/lib/python2.7/site-packages/django/core/management/base.py", line 220, in execute      output = self.handle(*args, **options)    File "/usr/lib/python2.7/site-packages/django/contrib/auth/management/commands/createsuperuser.py", line 134, in handle      User.objects.create_superuser(username, email, password)    File "/usr/lib/python2.7/site-packages/django/contrib/auth/models.py", line 144, in create_superuser      u.save(using=self._db)    File "/usr/lib/python2.7/site-packages/django/db/models/base.py", line 460, in save      self.save_base(using=using, force_insert=force_insert, force_update=force_update)    File "/usr/lib/python2.7/site-packages/django/db/models/base.py", line 570, in save_base      created=(not record_exists), raw=raw, using=using)    File "/usr/lib/python2.7/site-packages/django/dispatch/dispatcher.py", line 172, in send      response = receiver(signal=self, sender=sender, **named)    File "/root/Projects/ir_uploaded_copy/ir/setting/models.py", line 32, in location_title      if instance.is_superuser  and not instance.location.is_active and not instance.location.user.id:    File "/usr/lib/python2.7/site-packages/django/db/models/fields/related.py", line 239, in __get__      rel_obj = self.related.model._base_manager.using(db).get(**params)    File "/usr/lib/python2.7/site-packages/django/db/models/query.py", line 349, in get      % self.model._meta.object_name)  setting.models.DoesNotExist: Location matching query does not exist

The sample what i required is attached as image,please help me in doing this.

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